Update 7.35am: Margaret Kelly, 74, has been found safe and well in Dublin.
Update 12.08am: Gardaí in Dublin say they're very concerned for the welfare of a missing 74-year-old woman.
Margaret Kelly - who suffers from a medical condition - was last seen at around midday yesterday as she left St James Hospital following a visit.
She is described as being of medium build and carrying a large black handbag.
When last seen Margaret was wearing black trousers and a white sleeved cardigan.
She also wears glasses.
Anyone who's seen her is asked to contact Gardai.